[Mathematic: College] How to solve this series?

Hi there,

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i'm in trouble with this exercize.

I have to find a and m ,

How could i solve it? Could someone help me about "algoritm" steps to solve a series if i have parameters?

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I tried to separate into two series, multiply denominator and separating results.

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https://i.redd.it/k5dz568oyc231.jpg